Is PLTP p.Arg328Gln (c.983G>A) pathogenic?

PLTP p.Arg328Gln (c.983G>A) is classified Uncertain significance in PLTP (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-02). AlphaMissense: likely benign (0.0664); Rare (popmax 0.461%, mid).

How common is PLTP p.Arg328Gln (c.983G>A) in the general population?

PLTP p.Arg328Gln (c.983G>A) is rare (popmax 0.461%, mid) (gnomAD).

What do computational predictors say about PLTP p.Arg328Gln (c.983G>A)?

AlphaMissense predicts likely benign (score 0.0664) — an in-silico prediction, not a clinical call.

PLTP p.Arg328Gln

c.983G>A · rs200022812 · VCV2068139

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0664 · ACMG-weighted

gnomAD v4.1

Rare

rare (popmax 0.461%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0664	likely benign
REVEL	0.015	strongly benign-leaning
SaProt	LLR -1.23	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.22	GERP -2.6
Regional constraint	o/e 0.94	unconstrained · MANE · 13 kb · p 0.099 · regional, not allelic
Overall
CADD	2.379	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.461% Middle Eastern · 28/6,078 alleles

Filtering AF 0.327% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.283%

Overall 0.0237% 382/1,613,604 alleles · rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.461%	217
Ashkenazi Jewishnot grpmax-eligible	0.0811%	1,233
Admixed American	0.0334%	2,998
Remaining individualsnot grpmax-eligible	0.0288%	3,469
European (non-Finnish)	0.0231%	4,337
African / African-American	0.0147%	6,810
South Asian	0.00988%	10,118

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: PLTP
Protein: p.Arg328Gln
Coding: c.983G>A
MANE Select: NM_006227
dbSNP: rs200022812
Type: single nucleotide variant
Location: chr20:45902564 (GRCh38)
Gene constraint: LOEUF 1.002 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 89.36

Full PLTP gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

PLTP p.Arg328Trp Uncertain significance ★ ⚠ same residue
PLTP p.Ala155Thr Uncertain significance ★★ ⚠ same type
PLTP p.Ala155Val Uncertain significance ★★ ⚠ same type
PLTP p.Arg177Cys Uncertain significance ★★ ⚠ same type
PLTP p.Arg251Gln Uncertain significance ★★ ⚠ same type
PLTP p.Arg372His Uncertain significance ★★ ⚠ same type
PLTP p.Arg380Gln Uncertain significance ★★ ⚠ same type
PLTP p.Arg391Cys Uncertain significance ★★ ⚠ same type

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/pltp-p-arg328gln (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown